The Celebration Reverberation
| Episode Number | 11 |
|---|---|
| Season | 11 |
| Aired | 2017-12-14 |
| Overview | Sheldon and Wolowitz plan birthday celebrations for Amy and Halley, respectively. Also, Leonard receives a Christmas letter from his brother that causes him to spiral out about his own lack of accomplishments. |
| Runtime | 25 minutes |
| Absolute Number | 242 |
| Finale Type |